Main Entry: ra·tio

Pronunciation: \ˈrā-(ˌ)shō, -shē-ˌō\

Function: noun

Inflected Form(s): plural ra·tios

Etymology: Latin, computation, reason — more at reason

Date: 1660

1 a : the indicated quotient of two mathematical expressions b : the relationship in quantity, amount, or size between two or more things : proportion
2 : the expression of the relative values of gold and silver as determined by a country's currency laws